Sewing-machine



J. R. PERKINS.

Sewing Machine.

- No. 242,037. Patented May 24,1881.

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U IT D STATES PATENT OFFICEO JONAS R. PERKINS, OF NORWALK, OHIO.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 242,037, dated May 24, 1881. Application filed December 29, 1880. (Modem To all whom it may concern.-

Be it known that I, JONAS R. PERKINS, of Norwalk, in the county of Huron and State of Ohio, have invented certain new and useful Improvements in Sewing- Machines 5 and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, which form part of this specification.

My invention relates to certain improvements in mechanism for operating a shuttlelever.

Heretofore various means have been devised Some of the shuttlelevers have had th eirrear extremities connected directly to the lower extremities of perpendicular rotary shafts. Other shuttle-levers have employed links andlevers to connect them with perpendicular rotary shafts. All'of these various constructions are, however, subject to certain disadvantages or objections which I desire to obviate or avoid.

The main object of my invention is to provide a secondary lever which shall either directl y or indirectly transmit the movement of a perpendicular rotary shaft to the shuttlelever, said secondary lever having one extremity pivoted in position and its opposite extremityloosely connected with the shuttle-lever, connection between the rotary shaft and said secondary lever being formed at that portion of the latter which is located between its one pivotal end and its opposite end connection with the shuttle-lever. This construction causes the actuating power of the rotary shaft to be imparted to the secondary lever at a point located between its two extremities, and the peculiar oscillation of this secondary lever serves to oscillate the shuttle-lever in an improved and desirable manner.

Referring to the drawings, Figure l is a plan view of the under side of a sewing-machine bed-plate provided with theinvention. Fig. 2 is a vertical longitudinal sectional view of the same. Fig. 3 is a reverse plan view of a modification. 1

A suitable shuttle-lever, A, pivoted to the under side of thebed-plate B of a sewing-machine,

has its rear end directly connected with the forward end of ahorizontal secondary lever, O, the connection being ajoint, a, adapted to permit the two levers to have oscillating movement on their respective pivots. The secon dary leveris located below the bed-plate, and has its rear extremity pivoted at b to the under side of said bed-plate. It is provided with a longitudinal slot, 0, in which works a slide, d, pivoted on a crankpin, c. This crank-pin depends from a perpendicular rotary shaft, D, which passes down through an openingin the bed-plate and actuates the secondary lever. As this shaft is driven the slide pivoted on the crank-pin is caused to move in the longitudinal slot of the secondary lever. Thelatter oscillates on its pivotal end, and its opposite end imparts motion to the shuttle-lever. Each of the two levers therefore oscillates on its appropriate pivot in a horizontal plane below the bed-plate.

In the modification the secondary lever is indirectly connected with the shuttle-lever by a link, E, the latter having its extremities respectively pivoted to the rear end of the shuttle-lever and to the forward end of the secondary lever. A link, F, has one extremity pivoted to a crank, G, and its opposite extremity pivoted to the secondary lever at a point between the two extremities of the latter. This modification is adapted to cause the secondary lever to receive its actuating-power at a point between the pivotal end of said lever and its opposite end, which connects by link with the shuttle-lever.

It is apparent that various other modifications of the principle of construction may be devised; and it will be understood that my improvement includes all forms of mechanism which employ the essential features of invention set forth in the following claims.

Having fully described my invention, what I claim asnew, and desire to secure by Letters Patent, is

1, In a sewing-machine, the combination, with a shuttle-lever, a horizontal secondary lever having one extremity pivoted in position, and a device loosely connecting the other extremity of the secondary lever to the shuttlelever, of a rotary shaft, and a crank device which connects the latter with the secondary lever at a point between its two extremities, substantially as set forth.

2. In a sewing-machine, the combination, with a pivoted shuttle-lever, a horizontal secondary lever having its rear extremity pivoted in position, and a device loosely connecting the forward end of the secondary lever to the shuttle-lever, of a rotary shaft, and a crank device which connects the latter with the secondary lever at a point between its rear pivotal end and its forward end connection with the sh uttle-lever, substantially as set forth.

3. In a sewing-machine, the combination, with a pivoted shuttle-lever, a secondary lever located below the bed-plate and having its rear extremity pivoted to the latter, and a device loosely connecting the forward end of the secondary lever to the rear end of the shuttle-lever, of a perpendicular rotary shaft, and a crank device which connects the latter with said secondary lever at a point between its rear pivotal end and its forward end connection with theshuttle-lever,substantiallyas setforth.

4. In a sewing-machine, the combination, with a shuttlelever, a horizontal secondary lever provided with a longitudinal slot and having its rear extremity pivoted to the bedplate, and a device loosely connecting the forward end of the secondary lever to the shuttle-lever, of a perpendicular rotary shaft, a crank-pin secured to the latter, and a slide pivoted on the crank-pin and working in said slot of the secondary lever, substantially as set forth.

5. In a sewing-machine, the combination, with a pivoted shuttle-lever and a secondary lever located below the bed-plate and provided with a longitudinal slot, the rear extremity of the secondary lever being pivoted to the bed plate, the forward extremity of the secondary lever and the rear extremity of the shuttle'lever being directly connected together by a joint adapted to permit said levers to have oscillating movement in a horizontal plane on their respective pivots, of a perpendicular rotary shaft, a depending cranlcpin secured to the latter, and a slide pivoted on the crankpin and fitting in said slot of the secondary lever, substantially as set forth.

In testimony that I claim the foregoingl have hereunto set my hand this 21st day of December, 1880.

JONAS 1t. PERKINS.

Witnesses:

CoRT. M. SHOCK, SIDNEY N. PERKINS. 

